 ... since it is easily dressed in the rough, and grinds away faster in the finishing process. The method of manufacturing the Cretaceous sandstones at Blackdown, England, is told in an entertaining manner in the Transactions of the Geological Society...  Transactions of the Geological Society - Página 203de Geological Society of London - 1836Vista completa - Acerca de este libro
 | Arkansas. Geological Survey, 1887-1893, Geological Survey of Arkansas - 1892 - 514 páginas
...the Transactions of the Geological Society of London for 1836.* The writer says : "When first taken the stone is greenish and moist, and can be cut or...chopped with ease. The tools employed are a sort of adze called a basing hammer. The others are ordinary picks and shovels. A vertical post or anvil is... | |
 | Geological Survey of Arkansas - 1892 - 498 páginas
...the Transactions of the Geological Society of London for 1836.* The writer says : "When first taken the stone is greenish and moist, and can be cut or...chopped with ease. The tools employed are a sort of adze called a basing hammer. The others are ordinary picks and shovels. A vertical post or anvil is... | |
 | Geological Survey of Great Britain, Alfred John Jukes Browne - 1900 - 648 páginas
...irregular figure, embedded in looser sand . . . they vary from 6 to about 18 inches in diameter. " When first taken out the stone is greenish and moist...employed are a sort of axe or adze with a short handle, called a ' basiiig-hammer,' which is ground to a sharp edge. . " For the purpose of cutting the stones... | |
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